<template>
    <div class="top">
        <div class="left">
            <span class="lbtn" @click="goHome">首页</span>
        </div>
        <div class="center">
            <div class="title">智慧化大城市数据</div>
        </div>
        <div class="right">
            <span class="rbtn">统计报告</span>
            <span class="time">当前时间:{{ time }}</span>
        </div>
    </div>
</template>

<script setup lang="ts">
import { ref, reactive ,onMounted,onBeforeUnmount} from 'vue'
import {useRouter} from 'vue-router';
//引入时间插件
import moment from 'moment';
//存储当前时间
let time=ref(moment().format('YYYY年MM月DD日 hh:mm:ss'));
let timer=ref(0);
//获取路由器对象
let $router=useRouter();
//点击按钮的回调
const goHome=()=>{
    $router.push('./home')
}
//组件挂载完毕更新当前的时间
onMounted(()=>{
    timer.value=setInterval(()=>{
        time.value=moment().format('YYYY年MM月DD日 hh:mm:ss')
    },1000);
});
//组件销毁前，清掉定时器
onBeforeUnmount(()=>{
    clearInterval(timer.value)
})
</script>

<style lang="scss" scoped>
.top{
    width:100%;
    height:40px;
    display: flex;
    .left{
        flex:1;
        background:url(../../images/dataScreen-header-left-bg.png) no-repeat;
        background-size: cover;
        .lbtn{
            width:150px;
            height:40px;
            float: right;
            background:url(../../images/dataScreen-header-btn-bg-l.png) no-repeat;
            background-size: 100% 100%;
            text-align: center;
            line-height: 40px;//文字高度
            color: #29fcff;
            font-size: 20px;
        }
    }
    .center{
        flex:2;
        .title{
            width:100%;
            height: 74px;
            background: url(../../images/dataScreen-header-center-bg.png) no-repeat;
            background-size: 100% 100%;
            text-align: center;
            line-height: 74px;//文字高度
            color: #29fcff;
            font-size: 30px;
        }
    }
    .right{
        flex:1;
        background:url(../../images/dataScreen-header-left-bg.png) no-repeat;
        background-size: cover;
        display: flex;
        justify-content: space-between;
        align-items: center;
        .rbtn{
            width:150px;
            height:40px;
            
            background:url(../../images/dataScreen-header-btn-bg-r.png) no-repeat;
            background-size: 100% 100%;
            text-align: center;
            line-height: 40px;//文字高度
            color: #29fcff;
            font-size: 20px;
        }
        .time{
            color: #29fcff;
       
            font-size: 18px;
        }
    }
}
</style>
